Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Combination of cascade and pole changing Rheostat control Pole changing Cascade control Combination of cascade and pole changing Rheostat control Pole changing Cascade control ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The efficiency of diesel locomotives is nearly 60 to 70 percent 45 to 55 percent 30 to 40 percent 20 to 25 percent 60 to 70 percent 45 to 55 percent 30 to 40 percent 20 to 25 percent ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following braking systems on the locomotives is costly? Regenerative braking on electric locomotives All braking systems are equally costly Vacuum braking on steam locomotives Vacuum braking on diesel locomotives Regenerative braking on electric locomotives All braking systems are equally costly Vacuum braking on steam locomotives Vacuum braking on diesel locomotives ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following happens in Kando system? Single phase A.C. is converted into D.C. Three phase A.C. is converted into D.C. Single phase supply is converted into three phase system None of the listed here Single phase A.C. is converted into D.C. Three phase A.C. is converted into D.C. Single phase supply is converted into three phase system None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The voltage used for suburban trains in D.C. system is usually 220 V 24 V 12 V 600 to 750 V 220 V 24 V 12 V 600 to 750 V ANSWER DOWNLOAD EXAMIANS APP
Electric Traction ________ have maximum unbalanced forces. Steam locomotives Diesel locomotives All of the listed here Electric locomotives Steam locomotives Diesel locomotives All of the listed here Electric locomotives ANSWER DOWNLOAD EXAMIANS APP
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